Just had surgery haven't heard from boyfriend

I ended up in the ER Wednesday, had emergency surgery yesterday. I've called my boyfriend to inform him before I went to the operating room and all he said was "ok" he didn't call me at all until I texted him "wow" then he called. Still didn't seem concerned we didn't talk long. So long story short he hasn't called nor texted me all day. Should I just break up with him? It mean he don't care right?